Actually pi is defined to be the ratio of the circumference of the circle to the diameter of the circle. Therefore, you can solve for the diameter from that equation. Jan 2, Explanation: Diameter is the ratio of the circumference of the circle to the irrational constant 'pi' 3. Related questions What is the circumference of a inch circle if the diameter of a circle is directly If the radius of a circle is 4cm, what is the area?
How do you find the circumference of a circle with a diameter of 6 cm? The constant length is known as the radius. It is the shortest distance between the center and the locus. A line segment starting from the locus passing through the center and end on the locus is known as the diameter. The radius and the diameter are important parameters of a circle because they determine the size of the circle. To draw a circle, either radius or diameter is only required. It just keeps going. So now all we need to do is to plug in our number for diameter.
This is equal to, and also we said pi is equal to 3. Now to practice, try drawing a circle on a piece of paper, and measure your diameter with a ruler. Then, find your radius, and circumference. If we were to measure the distance running from the center of a circle to the outer edge of said circle, we would be finding the radius.
Think of a clock; if one of the hands was long enough to reach to the edge of the clock, this hand could be considered the radius of the clock — no matter what time it is! While the radius of a circle runs from its center to its edge, the diameter runs from edge to edge and cuts through the center. A radius is a line segment. With all of this in mind, we know to name a radius in the same way that we do all line segments: the name of both endpoints listed side-by-side often with a bar above the two letters.
If you remember only one fact about circles, let this one be it. Drill it into your mind! A radius is half the length of the diameter. In order to solve for either the radius or diameter of a circle, we need to know either its circumference or its area. Say that we were given the circumference. Notice that the square root of 9 can be either 3 or We know that circumference is the length of the entire outer edge of a circle. We could think of it this way: circumference is to circles what perimeter is to triangles, rectangles, pentagons, and so on!
In other words, we can wrap a string which is the same length as the diameter around the circle 3. The applications of circumference in everyday life are truly endless!
One example, though, is determining how large of a tire someone needs for a bike or for a car. With this measurement and the height of the tree , we could find the volume of wood within this tree.
Again, the list of examples could go on and on forever, so keep an eye out for other ways that you use circumference throughout your life! Think of circumference as an outer measurement and diameter as an inner measurement of the circle! So, perhaps we could say that diameter is 3.
If length is defined as the distance between two points, then yes, diameter is a length. The diameter of a circle measures the distance between the two furthest points on a circle.
Determine the circumference of the circle. We know that the diameter of the circle is 8 cm, and an approximation for pi is 3. The circumference of the circle is Determine the radius of the circle if the circumference is twenty-three inches.
Round your answer to the nearest hundredths. The radius of a circle can be calculated if the circumference is known. We also know that an approximation of pi is 3. The radius of the circle is 3.
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